It acutally fits really well. The tic tac toe aside, the attitude is spot on.
The game is a multiplayer game. It would be nice if people realised that when you decide to underperform, someone else has to pick up your slack.
At first low dps might not seem like a big issue, the things just die at slower rate, right? But the slow speed is actually making it harder for both the tank and healer. With bad dps the tank has to tank longer, which means more damage, which means the healer has to heal more, which means the healer and tank can dps less, which makes the run even slower. Basically one bad player is not just forcing others to the work, this person is also decreasing the performance of the whole team.